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Numerical simulation of the coalescence of two bubbles in an ultrasound field
Ultrasonics Sonochemistry ( IF 8.4 ) Pub Date : 2018-08-12 , DOI: 10.1016/j.ultsonch.2018.08.014
Zheng Xu

The coalescence of two bubbles under ultrasound irradiation is numerically investigated. The results indicate that ultrasound may accelerate the coalescence process, depending on the initial phase. The time-averaged nonzero Bjerknes force promotes bubble coalescence by dragging bubbles to nodes or antinodes, depending on their size. At the beginning of the coalescence process, a film forms between the two bubbles. The film drainage time first increases then decreases as a function of initial distance. This study contributes to an understanding of the effects of ultrasound on bubble coalescence.



中文翻译:

超声场中两个气泡合并的数值模拟

数值研究了两个气泡在超声辐射下的聚结。结果表明,超声可能会加速合并过程,具体取决于初始阶段。时间平均的非零Bjerknes力通过将气泡拖动到节点或波腹来促进气泡合并,具体取决于气泡的大小。在合并过程的开始,两个气泡之间会形成一层膜。胶片排水时间首先根据初始距离而增加,然后减少。这项研究有助于了解超声对气泡聚结的影响。

更新日期:2018-08-13
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